Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 73, NWS Fort Worth, TX

May 12, 2010Denton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 12, 2010, 8:50 PM CDT for Denton County, Texas. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 12, 2010, 8:50 PM CDT (01:50 UTC)
Expired
May 12, 2010, 9:30 PM CDT
In force
40 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon

County Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 72 km from the middle of the area, began a volume at 01:53 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 226 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2010-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1252 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2010-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 253 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1252 J/kg
Mixed-layer CIN
-157 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
253 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 12, 7:14 PM CDT, 1 hour 36 minutes earlier.

Area forecast discussion, May 12, 7:14 PM CDT, 1 hour 36 minutes before
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Hazardous weather outlook, May 12, 6:49 PM CDT, 2 hours 1 minute before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, May 12, 8:41 PM CDT, 9 minutes before
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<head>
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  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 12, 8:41 PM CDTSpecial Weather StatementFWDDenton34 min
May 12, 9:35 PM CDTSpecial Weather StatementFWDGrayson25 min
May 12, 10:01 PM CDTSpecial Weather StatementFWDGrayson29 min
May 13, 1:59 AM CDTSpecial Weather StatementFWDYoung31 min
May 13, 2:14 AM CDTSpecial Weather StatementFWDStephens61 min
May 13, 2:38 AM CDTSpecial Weather StatementFWDJack, Montague, Wise52 min
May 13, 3:23 AM CDTSpecial Weather StatementFWDYoung67 min
May 13, 4:56 AM CDTSpecial Weather StatementFWDMontague64 min
May 13, 7:31 AM CDTSpecial Weather StatementFWDYoung59 min
May 13, 7:47 AM CDTSevere Thunderstorm WarningFWDYoung58 min
May 13, 7:57 AM CDTSpecial Weather StatementFWDStephens33 min
May 13, 8:24 AM CDTSpecial Weather StatementFWDStephens36 min
May 13, 8:31 AM CDTSpecial Weather StatementFWDJack29 min
May 13, 8:57 AM CDTSpecial Weather StatementFWDJack33 min
May 13, 9:01 AM CDTSpecial Weather StatementFWDStephens29 min
May 13, 9:34 AM CDTSpecial Weather StatementFWDMontague26 min
May 13, 9:38 AM CDTSpecial Weather StatementFWDWise22 min
May 13, 10:06 AM CDTSpecial Weather StatementFWDCooke54 min
May 13, 10:30 AM CDTSpecial Weather StatementFWDJack30 min
May 13, 10:34 AM CDTSpecial Weather StatementFWDMontague26 min
May 13, 11:08 AM CDTSpecial Weather StatementFWDCooke37 min
May 13, 11:10 AM CDTSpecial Weather StatementFWDCooke35 min
May 13, 11:30 AM CDTSpecial Weather StatementFWDGrayson30 min
May 13, 11:40 AM CDTSpecial Weather StatementFWDMontague35 min
May 13, 12:09 PM CDTSevere Thunderstorm WarningFWDCooke46 min

Nearby

Severe Thunderstorm Warnings in Texas, 2010Every severe thunderstorm warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.